Matthew S Shepherd

US Patent:

8348373, Jan 8, 2013

Filed:

Mar 12, 2008

Appl. No.:

12/867053

Inventors:

Eric T. Martin - Corvallis OR, US
Michael W. Cumbie - Albany OR, US
Mark H. MacKenzie - Corvallis OR, US
Volker Smektala - Camas WA, US
Matthew A. Shepherd - Vancouver WA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

B41J 29/38
B41J 2/05

US Classification:

347 14, 347 60

Abstract:

A method for forwarding a firing signal within a nozzle group of a fluid ejection device includes receiving warm data and fire data. A firing signal having a firing pulse preceded by a warming pulse is received. The firing signal is conditionally modified according to of the fire data. The conditionally modified firing signal is forwarded to a particular nozzle circuit of the nozzle group.

US Patent:

20230086828, Mar 23, 2023

Filed:

Mar 31, 2020

Appl. No.:

17/909203

Inventors:

- Spring TX, US
William J. ALLEN - Corvallis OR, US
John J. BRIDEN - Palo Alto CA, US
Matthew A. SHEPHERD - Vancouver WA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Spring TX

International Classification:

G06F 30/10
G06F 30/20

Abstract:

According to examples, an apparatus may include a processor that may access a digital model of an item to be fabricated to have a plurality of features, in which the digital model may include a surface. The processor may pack a plurality of digital ellipsoids to intersect the surface of the digital model of the item, in which the plurality of digital ellipsoids are arranged with respect to each other based on a curvature of the surface. The processor may also determine locations on the surface at which the plurality of digital ellipsoids intersect the surface and may set the determined locations as points on the surface at which the plurality of features are to be formed.

US Patent:

20180333914, Nov 22, 2018

Filed:

Jul 31, 2018

Appl. No.:

16/051361

Inventors:

- Houston TX, US
Vladek Kasperchik - Corvallis OR, US
Alexey S. Kabalnov - San Diego CA, US
Shannon Reuben Woodruff - San Diego CA, US
Thomas M. Sabo - San Diego CA, US
Jake Wright - San Diego CA, US
Hector Lebron - San Diego CA, US
Vanessa Verzwyvelt - Vancouver WA, US
Morgan T. Schramm - Portland OR, US
Matthew A. Shepherd - Vancouver WA, US

International Classification:

B29C 64/165
C09D 11/322
B29C 67/00
B22F 1/00
B82B 3/00

Abstract:

In an example of a three-dimensional printing method, a polymeric build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric build material. The fusing agent includes cesium tungsten oxide nanoparticles, a zwitterionic stabilizer, and an aqueous vehicle. The polymeric build material is exposed to electromagnetic radiation to fuse the portion of the polymeric build material in contact with the fusing agent to form a layer.

US Patent:

20170310852, Oct 26, 2017

Filed:

Oct 14, 2014

Appl. No.:

15/518197

Inventors:

- Houston TX, US
Tsuyoshi Yamashita - Corvallis OR, US
Matthew A Shepherd - Vancouver WA, US

International Classification:

H04N 1/405
G06F 3/12
H04N 1/405
H04N 1/047

Abstract:

A system, method, and non-transitory computer readable medium are disclosed for mitigating dot placement errors for a given print job. The method includes processing tone values on a per pixel basis to determine whether to implement plane dependence. Plane independence is implemented if the tone value exceeds a predetermined threshold. The method may be performed on a pixel by pixel basis and/or a print object or region basis. Determining whether to implement plane dependence may involve de-asserting or partially de-asserting a plane dependence component of an executed half-toning instruction between sequentially processed color planes of a printing system.